Question

1. The most important _____source of air pollution is volcanic activity.
2. Due to the fast spread of industrialisation and
advancement of technology,____
has
become a universal problem.
3. Filtration allows any_____
matter to be
mechanically or physically removed from water.
4. Staining of teeth is an indication of ____
fluorosis.​

Answer 1

Answer:

1. sun

pollution

solid

condensation

Answer 2

Answer:

the most Important...........source of air pollution is volcanic activity